From 471ac2bd9efd1d5d4ee944d4a2134c4a709e4821 Mon Sep 17 00:00:00 2001
From: Scott Kiesel <kiesel.scott@gmail.com>
Date: Wed, 13 Jul 2022 22:04:23 -0400
Subject: [PATCH] Fix off by one indexing bug in plotutil.MedianAndMinMax when
 determining the mean of the two inner-most elements in the slice.

---
 plotutil/errorpoints.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plotutil/errorpoints.go b/plotutil/errorpoints.go
index ccb12d5a0..0ac8b5525 100644
--- a/plotutil/errorpoints.go
+++ b/plotutil/errorpoints.go
@@ -103,7 +103,7 @@ func MedianAndMinMax(vls []float64) (med, lowerr, higherr float64) {
 	}
 	sort.Float64s(vls)
 	if n%2 == 0 {
-		med = (vls[n/2+1]-vls[n/2])/2 + vls[n/2]
+		med = (vls[n/2]-vls[n/2-1])/2 + vls[n/2-1]
 	} else {
 		med = vls[n/2]
 	}